**5. Conclusions**

The current analysis is devoted to examining the unsteady three-dimensional non-axisymmetric Homann stagnation point flow of alumina (Al2O3) and copper (Cu) hybrid nanofluids in the presence of MHD. The governing partial differential equations are transformed into a system of ordinary differential equations by using a similarity transformation and appropriately solved by a bvp4c function in Matlab. An increment in λ may upsurge the velocity gradient and thus decline the momentum boundary layer thickness. A high concentration of the nanoparticle volume fraction speeds up the molecules' kinetic energy and then enhances the heat transfer process of the fluid particles. The increment in the intensity of the magnetic parameter *M* increases the local Nusselt number and the skin friction coefficient. Further, the increasing value of *A* decreases the hybrid nanofluid temperature and eventually improves the cooling rates of the fluid. Dual solutions were disclosed in this study, and the analysis of solution stability confirmed that the first solutions are stable and physically reliable.

**Author Contributions:** Research design, N.A.Z., R.N., K.N., and I.P.; Formulation and methodology, N.A.Z.; Result analysis, N.A.Z.; Validation, R.N., and K.N.; Article preparation, N.A.Z.; Review and editing, N.A.Z., R.N., K.N., and I.P. All authors have read and agreed to the published version of the manuscript.

**Funding:** The author would like to express sincere appreciations to Universiti Kebangsaan Malaysia, Universiti Teknikal Malaysia Melaka, and the Ministry of Education Malaysia for the funding and continuous encouragement. This work is fully supported by the research university gran<sup>t</sup> (GUP-2019-034) from the Universiti Kebangsaan Malaysia. The feedback and recommendations by the competent reviewers are very much appreciated.

**Acknowledgments:** The authors appreciate the valuable feedback and recommendations from the reviewers.

**Conflicts of Interest:** The authors declare no conflict of interest.
